Appeal No. 1999-0344
Application 08/250,770
adjust the density of the printed images by designating or selecting the data defining
the amount of light exposed in accordance with software as set forth in the summary of
the invention at the middle of page 6 of the specification as filed. It is stated there that
the sharpness of the printed images may be easily adjusted without adjusting the bias
voltage of the developing unit. This is brought out in more detail in the discussion in the
paragraph bridging pages 13 and 14 of the specification as filed.
In a corresponding manner, the discussion of pertinent portions of Hayashi
indicates a similar approach notwithstanding the focus of Hayashi’s invention being to
make his image forming apparatus more responsive to environmental conditions such
as humidity. Even as revealed in the abstract of Hayashi’s disclosure, the control
circuitry regulates the amount of light of the exposure apparatus, including operation in
accordance with the output of the humidity detector. This is consistent with the normal
operation of the circuitry associated with Hayashi’s invention. The printing unit 20 in
Figure 1B operates upon taking the provided image signals from the reader 100 "after
pulse width modulation etc., for driving the laser element." (column 4, lines 40-43). This
is detailed more in the discussion beginning at column 5 associated with Figure 2 and
the corresponding discussion of Figures 16 and 14-1 and 14-2 beginning at column 5,
line 31. At least the discussion at column 6 of Hayashi indicates that the amount light
5
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